pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-73295-4398_John_Peel_Galop.ps) >>/Users/jc/w/tmp/Tune-73295-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM4/4398_John_Peel_Galop.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-73295-4398_John_Peel_Galop.abc 534 ABC music file with the extracted tune(s)
Tune-73295-4398_John_Peel_Galop.ps 37079 PostScript
Tune-73295-4398_John_Peel_Galop.txt 534 Plain-text file with the extracted tune(s)
Tune-73295-get.log 4556 Log file, useful mostly for debugging
These files should be available for 24 hours.